LV Earth Fault on HV side
LV Earth Fault on HV side
(OP)
Hi,
Quick question please, if a transformer has 11kV at primary and 415V at secondary, why is it wrong to say that an earth fault of X amps on the LV side is equivalent to a current of:
Y = X * 415 / 11000?
Why doesn't the earth fault follow the turn ratio?
Thanks.
Quick question please, if a transformer has 11kV at primary and 415V at secondary, why is it wrong to say that an earth fault of X amps on the LV side is equivalent to a current of:
Y = X * 415 / 11000?
Why doesn't the earth fault follow the turn ratio?
Thanks.






RE: LV Earth Fault on HV side
RE: LV Earth Fault on HV side
Thanks yes that's the exact configuration. In this case what is the transformation ratio if not 415/11000?
Thanks.
RE: LV Earth Fault on HV side
A more direct answer is that the ratio is 11,000 : 240 or 45.83 : 1